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Sponsor: National Institute of Allergy and Infectious Diseases (NIAID)

Conditions: HIV

Countries: Liberia

Background: There are many people living with human immunodeficiency virus (HIV) infection in Liberia. Most experts consider HIV an epidemic there. Researchers want to collect health data from Liberians with HIV over several years. This may help HIV prevention and treatment programs in Liberia. Objective: To learn more about how HIV affects people in Liberia. Eligibility: People with HIV in Liberia Design: Participants will be screened with a blood sample. Participants will visit the study clinic about 10 times over 3 years. They will need to return to the clinic after some visits to get test results. The visits will be closer together during the first part of the study and less frequent later. At each study visit, participants will: * Have a brief physical exam * Answer questions about how they are feeling and what medicines they are taking * Have blood taken from an arm vein by a needle * Give urine samples Participants ages 12 years or older may be asked questions about HIV risk behaviors. These include sex practices and drug use. Participants ages 18 years or older may be asked how their HIV infection makes them feel emotionally. Participants may be asked to join a research substudy. This will be about tuberculosis (TB) testing in people with HIV. For this substudy, participants will have a TB skin test. A small amount of liquid will be injected under the skin on the arm. Participants will return to the clinic a few days later. The test area will be checked. They will get their test results.